Evaluating Two Variable Expressions

In this video, Mr. J explains how to evaluate expressions with two variables using four examples. The video covers the process of substituting values for variables and applying the order of operations to solve expressions. Examples include simple addition, division with parentheses, multiplication with exponents, and a combination of operations. The video aims to help viewers understand how to systematically evaluate expressions by plugging in values and following the correct order of operations.

What is the value of 'a + b' if a = 4 and b = 3?

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If 'a = 4' and 'b = 3', what is 'a + b'?

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For the expression '21 + b', what is the value if b = 3?

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How do you calculate '(21 + b) / a' for a = 4 and b = 3?

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What does '4^2' evaluate to?

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What is the result of '2 * 10' in the context of the expression 'x * y'?

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What is the result of 'x * y + 4^2' if x = 2 and y = 10?

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In the expression '5x + 3y - 30', what does '5x' evaluate to if x = 2?

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Calculate '5x + 3y - 30' for x = 2 and y = 10.

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What is the final result of '10 + 30 - 30'?

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